Keyless lock.



N0.- 693,||4. Patented Feb. ll, I902. I

A. F. GORBIN.

KEYLESS LOOK.

(Application filed July 9, 1901.]

(No Model) 514mm Q vWnmv/a [W mime/1 S UNITED STAT S PATENT OFFICE.

ALBERT F. CORBIN, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO CORBINCABINET LOCK COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPO- RATION OFCONNECTICUT.

KEYLESS LOCK.

SPECIFICATION forming part of Letters Patent No. 693,1 14, datedFebruary 11, 1902.

Application filed July 9,1901.

To all whom it may concern:

Be it known that I, ALBERT F. CORBIN, a citizen of the United States,and a resident of New Britain, in the county'of Hartford and 3 State ofConnecticut, have invented certain new and useful Improvements inKeyless Locks, of which the following is a description, whereby any oneskilled in the art may make and use the same.

The object of my invention is to produce a lock of this descriptionhaving features of novelty and advantage. The uses to which sum a lockmay be applied are numerous, and I do not care to limit myself to anyparticu- I lar use.

In the drawings I have shown my invention as embodied in a lock for useon postoffice-box doors.

Figure l is a front View of a post-office-box 2o door and frame. Fig. 2is a rear view showing the bolt locked. Fig. 3 is a rear view showingparts in position so that the bolt may be retracted.

Referring to the drawings, A denotes the 2 5 frame of an ordinarypost-office lock-box, and

B the door hinged thereto.

C D are dials similar to those usually employed in keyless orcombinationlooks. The dials, as shown in the drawings, are located in recesses inthe door and have knobs c d, by which they are turned. At the rear thesedials have stems c d, which project through openings inthe door. Securedto the stems are gears E F. These gears are keyed to the stems 0 cl,

so that they will turn withthe stems. One

way of doing this is illustrated in the drawings, where the stems areshown'as havinga square or irregular cross-section, the gears fittingclosely on the stem and held in place 40 by cotters.

Loosely mounted on the stud G are the gears H K, one of said gears Hmeshing with the gear E and the other gear K meshing with the gear F. Inthe peripheries of these gears H K there are formed slots or recesses h70.

The bolt M carries the spring-actuated locking-latch N and a stump P.This bolt has a limited sliding movement. It is apparent from thedrawings that when the parts are in position shown in Fig. 2 the bolt Mcannot be retracted, because the gears H K lie in the path of movementof the stump P, which is carried by the bolt. When the parts Serial No.67,624. (No model.)

locked. This bolt M is normally held in its forward position by thespring Q, andit carries on it a spring-latch R, which permits the doorto be closed when the combination is ofi. The relation of the slots inthe gears H K with the characters on the face of the dial may be changedat will to alter the combination.

It is clear that modifications and alterations in the arrangement andnumber of the parts may be made without departing from the spirit of myinvention, and I intend to include herein any and all suchmodifications.

I claim as my invention- 1. In a keyless lock two or more dials, gearsoperated thereby, tumblers corresponding in number to the number ofgears, said tumblers being revolubly mounted on the same stud, teethformed about the peripheries of said tumblers whereby a tumbler is movedby its corresponding gear and dial, a slot formed in the periphery ofeach tumbler, the sliding lock-bolt provided with a stump, said stumpbeing adapted to enter the recesses in all the tumblerswhen saidrecessesregister with one another and lie in the path of movement ofsaid stump, all substantially as described and for the purposes setforth.

2. In a keyless lock in combination the dials having operating-handles,and stems projecting from their rear faces, gears mounted on thedial-stems, means for varying the angular relation of said gears withrespect to said dials, a corresponding number of gears revolubly mountedon-the same stud, each of the first -mentioned gears meshing with one ofthe gears on the dialstems, slots in the peripheries of therevolublymounted 5 gears, the sliding lock-bolt, and the stump carriedthereby and adapted to cooperate with the slots in the revolublymountedgears whereby the bolt maybe retracted when said slots register with oneanother and lie in the loo path of movement of the stump.

ALBERT F. CORBIN.

Witnesses:

G. E. R001, 0. A. BLAIR.

